Trivia Question Series 2 # 1 / Floatplanes, Amphibs & Flying Boats 10 / 24

This flying boat flown by the RAAF performed the types first unassisted kill of a U-Boat in 1940. Name this aircraft. Answer by PM only. Do not answer " Was It ". Answer will be posted Thur 10 / 26 at 1100 hrs. Their will be 10 questions in this series.